Celebrities and world-class athletes packed into XS Nightclub at Encore Las Vegas to catch the beats of the Avicii last night.

Among the crowd was MMA fighter Tito Ortiz with wife Jenna Jameson. Ortiz was on the card for UFC 148, his last match as a pro UFC fighter before making his official retirement. Though Forrest Griffin pulled out the win against the MMA fighter in Saturday’s battle, Ortiz was inducted into the UFC Hall of Fame ending his monumental 15-year career on a high note. The happy couple was later joined by former UFC champion Chuck Liddell to help celebrate the beginning of a new era in Ortiz’s life.

Later in the evening, Los Angeles Lakers shooting guard Kobe Bryant stepped into the building. In town for the USA Olympic basketball tryout training sessions, the recently announced roster contained the Lakers’ stud and Bryant celebrated the achievement from a private table at XS. In a separate group, actor Sean Patrick Flanery, most famous for his role as Connor MacManus in The Boondock Saints, came out to join the Independence Week festivities.

As the stars and athletes continued to party into the early hours of the morning, international producer Tiesto paid Avicii an onstage visit. The Dutch resident DJ filled the venue with his tracks the previous evening as he kicked off Independence Week and returned to support his fellow EDM artist.

Independence Week at XS closes this evening with a special Night Swim soiree with Otto Knows.

Click on the photos below to enlarge.

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